Surfactants of the polyoxyethylene mono and polyol groups. Part. II. The ideal solubility, solubility parameter and surface activity of oxyethylenated derivatives of stearic acid and castor oil

Polimery ◽  
1998 ◽  
Vol 43 (10) ◽  
pp. 612-618
Author(s):  
MARIAN MIKOLAJ ZGODA ◽  
MICHAL KOLODZIEJCZYK ◽  
ARTUR REDLINSKI
Keyword(s):  
Stearic Acid ◽  
Surface Activity ◽  
Solubility Parameter ◽  
Castor Oil ◽  
Derivatives Of ◽  
The Ideal

The combined effect of lattice’s uniaxial strains and electron–phonon interaction’s screening on TBEC of the intersite bipolarons

2016 ◽  
Vol 30 (26) ◽  
pp. 1650186
Author(s):  
B. Yavidov ◽  
SH. Djumanov ◽  
T. Saparbaev ◽  
O. Ganiyev ◽  
S. Zholdassova ◽  
...  
Keyword(s):  
Ideal Gas ◽  
Einstein Condensation ◽  
Chain Model ◽  
One Dimensional ◽  
Electron Phonon Interaction ◽  
Model Lattice ◽  
Experimental Values ◽  
Bose Einstein ◽  
Derivatives Of ◽  
The Ideal

Having accepted a more generalized form for density-displacement type electron–phonon interaction (EPI) force we studied the simultaneous effect of uniaxial strains and EPI’s screening on the temperature of Bose–Einstein condensation [Formula: see text] of the ideal gas of intersite bipolarons. [Formula: see text] of the ideal gas of intersite bipolarons is calculated as a function of both strain and screening radius for a one-dimensional chain model of cuprates within the framework of Extended Holstein–Hubbard model. It is shown that the chain model lattice comprises the essential features of cuprates regarding of strain and screening effects on transition temperature [Formula: see text] of superconductivity. The obtained values of strain derivatives of [Formula: see text] [Formula: see text] are in qualitative agreement with the experimental values of [Formula: see text] [Formula: see text] of La[Formula: see text]Sr[Formula: see text]CuO4 under moderate screening regimes.

scholarly journals Structural and Solubility Parameter Correlations of Gelation Abilities for Dihydroxylated Derivatives of Long-Chain, Naturally Occurring Fatty Acids

2015 ◽  
Vol 21 (23) ◽  
pp. 8530-8543 ◽  
Author(s):  
Mohan Zhang ◽  
Sermadurai Selvakumar ◽  
Xinran Zhang ◽  
Mukund P. Sibi ◽  
Richard G. Weiss
Keyword(s):  
Fatty Acids ◽  
Solubility Parameter ◽  
Naturally Occurring ◽  
Derivatives Of ◽  
Long Chain

scholarly journals Temperature effects on surface activity and application in oxidation of toluene derivatives of CTAB-SDS with KMnO4

2006 ◽  
Vol 118 (3) ◽  
pp. 281-285 ◽  
Author(s):  
Yu Tang ◽  
Biying Du ◽  
Jun Yang ◽  
Yuanming Zhang
Keyword(s):  
Surface Activity ◽  
Temperature Effects ◽  
Derivatives Of

Extended use of receiver groups: Theory, synthetic example, and noise considerations

Geophysics ◽  
2020 ◽  
Vol 85 (6) ◽  
pp. P53-P66
Author(s):  
Kjetil E. Haavik
Keyword(s):  
Noise Level ◽  
Signal To Noise Ratio ◽  
Random Noise ◽  
Higher Order ◽  
Sinc Interpolation ◽  
Seismic Acquisition ◽  
Multichannel Sampling ◽  
The Individual ◽  
Derivatives Of ◽  
The Ideal

Receiver grouping is commonly used in marine towed-streamer seismic acquisition. Measurements from several receivers in a group are stacked to increase the signal-to-noise ratio of the resulting data and form an analog spatial antialiasing filter. I propose a method for extracting inline derivatives of the wavefield as additional measurements from the groups. This is achieved by multiplying the signal from the individual receivers in a group with predefined weights that corresponds to a finite-difference (FD) operator. The inline derivative(s) makes it possible to use multichannel sampling theorems to reconstruct the signal on a denser grid. Extraction of FD data from clusters of receivers is not a new concept, but I find that, by using the geometry of conventional streamer groups, it is possible to obtain FD data which are well suited for multichannel interpolation. The key to finding suitable FD operators is to recognize that it is not the ideal differentiation response we seek, but the impulse response of the group multiplied with the ideal differentiation response. Furthermore, under a Gaussian noise assumption, I derive formulas for the resulting noise level from sinc and higher order sinc interpolations. I find that the random noise level in the reconstructed data, when using higher order sinc interpolation, is expected to be higher than when using conventional sinc interpolation and will vary with respect to the distance from the original sampling points. The statistical analysis shows that it is beneficial to find FD operators with as small an [Formula: see text] norm as possible. A synthetic example shows that the proposed method of extracting FD operators and subsequent interpolation works very well. I foresee that the proposed method can be used to reduce the density of receivers (hydrophones or geophones) when designing new streamers or with existing equipment to improve the inline sampling.

Synthesis and spreading behaviour of some reactive derivatives of long-chain alcohols and carboxylic acids

1984 ◽  
Vol 62 (3) ◽  
pp. 574-579 ◽  
Author(s):  
David A. Holden
Keyword(s):  
Mass Spectrometry ◽  
Fatty Acids ◽  
Surface Activity ◽  
Azo Compounds ◽  
Single Chain ◽  
Bulk Solid ◽  
Potential Applications ◽  
Curing Agents ◽  
Derivatives Of ◽  
Long Chain

Procedures are described for the synthesis of several azides, diimides, and azodiformates from long-chain alcohols and fatty acids. These reactive compounds have potential applications as thermal and photochemical curing agents, and as surface-modifying agents for the preparation of filled plastics and chromatographic packings. The surface activity of the compounds was characterized by investigations of their spreading behaviour in monolayers on water. Unlike the single-chain azides and azo compounds, which give well-defined monolayers at all temperatures, monolayers of diacyl diimides and dialkyl azodiformates with two long-chain substituents are unstable with respect to collapse to the bulk solid. The photoreaction of monolayers of octadecanoyl azide to give a mixture of products derived from an intermediate isocyanate was demonstrated by ir and mass spectrometry.

Robust Organogels from Nitrogen-Containing Derivatives of (R)-12-Hydroxystearic Acid as Gelators: Comparisons with Gels from Stearic Acid Derivatives†

Langmuir ◽  
2009 ◽  
Vol 25 (15) ◽  
pp. 8615-8625 ◽  
Author(s):  
V. Ajay Mallia ◽  
Mathew George ◽  
Daniel L. Blair ◽  
Richard G. Weiss
Keyword(s):  
Stearic Acid ◽  
Hydroxystearic Acid ◽  
Derivatives Of
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